Tuesday, July 2 - Session 2 - 16:30

Inversions for the internal structure of stars using the differential response technique

I.W. Roxburgh1,2, S.V. Vorontsov1,3
1Astronomy Unit, Queen Mary University of London, Mile End Road, London E1 4NS, UK
2 LESIA, Observatoire de Paris, Place Jules Janssen, 92195, Meudon, France
3 Institute of Physics of the Earth, B. Gruzinskaya 10, Moscow 123810, Russia

 

We describe the non-linear differential response inversion technique to yield the internal structure of stars from a set oscillation frequencies of low degree p-modes, and present the results of inversions using frequency sets from models of non rotating stars of 0.8, 1 and 1.45 M. We explore the sensitivity of the inversions to the frequency coverage and range of values, and to random errors with standard deviations = 0.3 Hz and =0.1 Hz, such as should be obtained with the space missions Eddington and COROT. The technique enables us to satisfactorily recover the interior structure of the the stars out to half the stellar radius

 
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